Fits 13 to 24 Screens: This heavy-duty 3 + 1 quad monitor mount holds four 13 to 24 screens weighing up to 15.4 lbs each with 75x75mm or 100x100mm VESA patterns -Patented- Articulation and Height Adjustment: Enjoy comfortable viewing angles with +45° to -45° tilt, 180° swivel, 360° rotation, and height adjustment along the center pole. Turn your screen to portrait or landscape orientation for your preferred layout